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Is Java really slow?
...y optimized code written in a ahead-of-time compiled language (C, Fortran, etc.) can beat it; however, Java can be more than 10x as fast as PHP, Ruby, Python, etc. There are specific areas where it can beat common compiled languages (if they use standard libraries).
There is no excuse for "slow" Ja...
如何让Finder显示出根目录的/usr和/etc等隐藏文件夹 - 更多技术 - 清泛网 -...
如何让Finder显示出根目录的/usr和/etc等隐藏文件夹两种方法都可以，好坏自己体会：方法一：终端输入：defaults write com.apple.finder AppleShowAllFiles TRUE2 killall Finder同理将...两种方法都可以，好坏自己体会：
方法一：
终端输入：
...
How to use Elasticsearch with MongoDB?
...//downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
Get the 10gen package.
sudo apt-get install mongodb-10gen
Then pick your version if you don't want the most recent. If you are setting your environment up on a windows 7 or 8 machine s...
How to use OrderBy with findAll in Spring Data
...StudentEntity, Integer> {
public List<StudentEntity> findAllByOrderByIdAsc();
}
The code above should work. I'm using something similar:
public List<Pilot> findTop10ByOrderByLevelDesc();
It returns 10 rows with the highest level.
IMPORTANT:
Since I've been told that it's eas...
What's the difference between git clone --mirror and git clone --bare
... cloned repo has it all. It's also set up so that a remote update will re-fetch everything from the origin (overwriting the copied refs). The idea is really to mirror the repository, to have a total copy, so that you could for example host your central repo in multiple places, or back it up. Think o...
PHPMyAdmin Default login password [closed]
...y, coming to the solution, this is what I was required to do:
su -
gedit /etc/phpMyAdmin/config.inc.php
if not found... try phpmyadmin - all small caps.
gedit /etc/phpmyadmin/config.inc.php
Locate
$cfg['Servers'][$i]['AllowNoPassword']
and set it to:
$cfg['Servers'][$i]['AllowNoPassword']...
How to use java.net.URLConnection to fire and handle HTTP requests?
...ie attributes which are irrelevant for the server side like expires, path, etc. Alternatively, you could also use cookie.substring(0, cookie.indexOf(';')) instead of split().
Streaming mode
The HttpURLConnection will by default buffer the entire request body before actually sending it, regardless o...
HTML Script tag: type or language (or omit both)?
...ocument. Depending on what DOCTYPE you use, the type value is required in order to validate the HTML document.
The language attribute lets the browser know what language you are using (Javascript vs. VBScript) but is not necessarily essential and, IIRC, has been deprecated.
...
Difference Between Invoke and DynamicInvoke
...er! If you just know that it is Delegate, it has to resolve the parameters etc manually - this might involve unboxing, etc - a lot of reflection is going on. For example:
Delegate slowTwice = twice; // this is still the same delegate instance
object[] args = { i };
object result = slowTwice.Dynamic...
MongoDB with redis
...s associated operations (union, intersection, difference on multiple sets, etc ...). It is quite easy to implement a basic faceted search or tagging engine on top of this feature, which is an interesting addition to MongoDB more traditional indexing capabilities.
Redis supports efficient blocking po...